posted
I donīt understand what happend with my tm323 carbs.... today my engine is impossible to keep iddle, i have tried to change glow plugs (4, novarossi 6, 7, maccoy 8, 9), two differents 25% fuel (crash competition, alabesa), i have tried to change the iddle, low spped and high speed screws.... and nothig is right....
The only combination possible to keep the engine iddle is a 3,5 mm of air gap (too much) with 3 turns in low spped and 5 on the high speed.
What happends?
Yesterday iīve been runnig with practiclly factory setting and all right with the RB power and the temperature.
Iīve been searching problems with the fuel line, fuel tank and no problems or air leaks, is possible that the carburetor is bad again? the engine has a good compresion too
Iīm really very disappointed with the tm323 carb, this is a warranty carb and only work right for 3 weeks...
what can i do?
Posts: 19 | From: Spain | Registered: Mar 2005
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An engine is a mechanical item, like the carburetor and once it works it will do the same thing all the time..., unless something has happened which you might have overseen or did not notice.
I do not think your problem is related to the quality of the carburetor but more to the setting of it and so suggest you ask again your LHS to advice you with this issue.
posted
Hi again Rody and thanks for your quick answer, i have seend a e-mail to Michel Nijman with all information about the problems i have.
Is possible that the carb have any airleak and the fuel in a low iddle canīt get in to the carb?
Iīve been looking the carb and only when i open the air gap about 4mm the engine keep iddle (isnīt too rich, i have close a lot the low speed and the high seed sometimes)
Posts: 19 | From: Spain | Registered: Mar 2005
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posted
The problem as you discribed it is not very easy to find out what is wrong because your engine has worked correctly before and now suddenly does not work anymore. This seems more a setting problem to me or maybe something else is wrong. But it is hard to believe that this is again the carburetor.
posted
Hi rody iīve been working with the carb to find any problem and i have found this:
I have added grease in all of the o-rings and screws in the carb and now the carb work better in the way that a I can put an air gap of near 2 mm and with a lsn of 4 turns (affter the problem the lsn had 6,5 turns and works like a devil)the engine can iddle normaly but only in iddle get a 100š C of temperature, too high, no?.
If i try to rich a little in the high screw but the engine sound a little bad and the temperature donīt go down to much... if i try tho rich a little de lsn the engine donīt iddle correctly.
To help you i have test with 2 diferents glowplugs (new glow plugs) and 2 25% fuels (a good quality fuel)
Can you tell me a tests to do to orient the problem?
thanks in advance.
Posts: 19 | From: Spain | Registered: Mar 2005
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posted
An airgap of 2mm when the carburetor is closed seems too big to me. How is your compression? When the engine stalls how does it stall?
100°C at idle is indeed high, does your engine get enough fuel because also when the engine is too lean at idle it will become too hot, however it is always difficult to find the right balance in the carburetor setting.
The compressionīs engine seems to be perfect, like the others times that the engine runs ok, if i try to close more than 2 mm the air gap i canīt get a good iddle.
When the engine stalls is because the iddle goes down quickly.
I donīt know is we have a problem with the fuel presure or if we have a problem with the carb,
I donīt know what to do to test a little more the carb, always when I try to rich a little the HSN the temperature donīt go down to much... if i try to rich a little de LSN the the temperature goes down but we have problems again with the iddle.
Now is impossible to find the right balance in the carburetor setting with these types of problems.
My LHS has told that we need speal with you to solve this problem but we donīt know what to do to find the problem when 2 weeks ago the engine runs like a clock with a full power machine and good temps.
Posts: 19 | From: Spain | Registered: Mar 2005
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posted
I think what you are encountering is a carburetor setting problem, this because before the engine worked well and now it seems off tune.
It is almost impossible for us to see from here what is wrong, the only thing I can suggest is to lean more the LSN and to richen up more the HSN and try again.
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